Ua ntej, qhov kev paub txog kev kho qhov muag module
1.Definition ntawm optical module:
Optical module: uas yog, optical transceiver module.
2.Cov qauv ntawm optical module:
Lub optical transceiver module yog tsim los ntawm ib qho khoom siv optoelectronic, kev ua haujlwm hauv Circuit Court thiab ib qho khoom siv kho qhov muag, thiab cov khoom siv optoelectronic suav nrog ob ntu: xa thiab txais.
Cov kis tau tus mob yog: ib qho hluav taws xob teeb liab inputing ib co code tus nqi yog ua tiav los ntawm ib tug sab hauv tsav nti tsav ib tug semiconductor laser (LD) los yog lub teeb emitting diode (LED) emit ib tug modulated lub teeb teeb liab ntawm tus nqi sib raug, thiab ib tug optical. fais fab tsis siv neeg tswj Circuit Court yog nyob rau hauv muab nyob rau hauv.Qhov tso zis optical teeb liab fais fab tseem nyob ruaj khov.
Qhov tau txais yog: lub teeb liab optical input module ntawm qee tus lej code tau hloov mus rau hauv lub teeb liab hluav taws xob los ntawm photodetecting diode.Tom qab lub preamplifier, hluav taws xob teeb liab ntawm tus lej code tus nqi yog cov zis, thiab cov teeb liab tso zis feem ntau yog qib PECL.Nyob rau tib lub sij hawm, lub tswb ceeb toom yog tso tawm tom qab lub input optical zog yog tsawg tshaj li ib tug tej yam nqi.
3.Qhov tsis muaj thiab qhov tseem ceeb ntawm qhov kho qhov muag module
Optical modules muaj ntau yam tseem ceeb ntawm optoelectronic technical parameters.Txawm li cas los xij, rau ob qhov kub-swappable optical modules, GBIC thiab SFP, peb qhov tsis muaj kev txhawj xeeb tshaj plaws thaum xaiv:
Nruab nrab wavelength
Hauv nanometers (nm), tam sim no muaj peb hom loj:
850nm (MM, multimode, tus nqi qis tab sis luv luv kis tau tus mob, feem ntau tsuas yog 500M);1310nm (SM, ib hom, poob loj thaum lub sij hawm kis tau tus mob tab sis me me dispersion, feem ntau yog siv rau kis nyob rau hauv 40KM);
1550nm (SM, ib hom, tsawg poob thaum kis tau tus mob tab sis loj dispersion, feem ntau siv rau kev sib kis ntev tshaj 40KM, thiab tuaj yeem xa ncaj qha 120KM yam tsis muaj relay);
Tus nqi kis tau tus mob
Tus naj npawb ntawm cov khoom (ntsis) ntawm cov ntaub ntawv xa mus rau ib ob, hauv bps.
Tam sim no muaj plaub hom kev siv: 155 Mbps, 1.25 Gbps, 2.5 Gbps, 10 Gbps, thiab lwm yam.Tus nqi kis tau tus mob feem ntau rov qab tau tshaj.Yog li ntawd, 155M optical module tseem hu ua FE (100 Mbps) optical module, thiab 1.25G optical module kuj hu ua GE (Gigabit) optical module.Qhov no yog qhov feem ntau siv module hauv optical kis tau tus mob.Tsis tas li ntawd, nws tus nqi xa mus rau hauv fiber ntau cia systems (SAN) yog 2Gbps, 4Gbps thiab 8Gbps.
Kev sib kis nrug
Lub teeb liab kho qhov muag tsis tas yuav tsum tau xa mus rau qhov deb uas tuaj yeem xa ncaj qha, hauv mais (tseem hu ua mais, km).Optical modules feem ntau muaj cov nram qab no specifications: multimode 550m, ib hom 15km, 40km, 80km, thiab 120km, thiab hais txog.
Qhov thib ob, lub tswv yim yooj yim ntawm optical modules
1.Laser qeb
Lub laser yog qhov tseem ceeb tshaj plaws ntawm cov khoom siv kho qhov muag uas txhaj tam sim no rau hauv cov khoom siv semiconductor thiab tawm lub teeb laser los ntawm photon oscillations thiab nce hauv kab noj hniav.Tam sim no, feem ntau siv lasers yog FP thiab DFB lasers.Qhov txawv yog tias cov khoom siv semiconductor thiab cov kab noj hniav sib txawv.Tus nqi ntawm DFB laser yog kim kim tshaj li FP laser.Optical modules nrog kis nrug mus txog 40KM feem ntau siv FP lasers.Optical modules nrog kis nrug.≥40KM feem ntau siv DFB lasers.
2.Kev xa hluav taws xob kho qhov muag thiab tau txais rhiab heev
Lub zog xa hluav taws xob xa mus yog hais txog qhov tso zis hluav taws xob kho qhov muag ntawm lub teeb pom kev ntawm qhov kawg ntawm qhov khoom siv kho qhov muag.Qhov tau txais rhiab heev yog hais txog qhov tsawg kawg nkaus tau txais lub zog kho qhov muag ntawm qhov kho qhov muag module ntawm tus nqi thiab qhov yuam kev me ntsis.
Cov chav nyob ntawm ob qhov ntsuas no yog dBm (lub ntsiab lus decibel milliwatt, lub logarithm ntawm lub hwj chim unit mw, cov qauv kev suav yog 10lg, 1mw hloov mus rau 0dBm), uas yog siv los txheeb xyuas qhov sib kis ntawm cov khoom, sib txawv wavelengths, Kev sib kis tus nqi thiab Cov khoom siv kho qhov muag optical xa tawm lub zog thiab tau txais rhiab heev yuav txawv, tsuav yog qhov kev sib kis tau zoo tuaj yeem ua kom ntseeg tau.
3. Poob thiab dispersion
Poob yog qhov poob ntawm lub teeb lub zog vim qhov nqus thiab tawg ntawm qhov nruab nrab thiab qhov xau ntawm lub teeb thaum lub teeb xa mus rau hauv fiber ntau.Qhov no ntawm lub zog yog dissipated nyob rau hauv ib tug tej yam npaum li cas kis tau tus mob nyob rau hauv tsub zuj zuj.Qhov dispersion yog feem ntau yog tshwm sim los ntawm qhov tsis sib npaug ceev ntawm electromagnetic tsis ntawm txawv wavelengths propagating nyob rau hauv tib lub nruab nrab, uas ua rau sib txawv wavelength Cheebtsam ntawm lub optical teeb liab mus txog rau. tau txais qhov kawg ntawm lub sijhawm sib txawv vim qhov sib txuam ntawm qhov sib kis ntawm qhov deb, ua rau cov mem tes dav dav thiab yog li tsis muaj peev xwm paub qhov txawv ntawm cov cim.tus nqi.Ob qhov kev txwv no feem ntau cuam tshuam rau qhov kis tau tus mob ntawm qhov kho qhov muag module.Hauv cov txheej txheem kev thov tiag tiag, 1310nm optical module feem ntau suav qhov txuas poob ntawm 0.35dBm / km, thiab 1550nm optical module feem ntau suav qhov txuas poob ntawm .20dBm / km, thiab suav cov nqi dispersion.Yooj yim heev, feem ntau tsuas yog siv rau kev siv.
4.Lub neej ntawm optical module
Cov qauv kev sib koom ua ke thoob ntiaj teb, 50,000 teev ua haujlwm tas li, 50,000 teev (sib npaug rau 5 xyoos).
SFP optical modules yog tag nrho cov LC interfaces.GBIC optical modules yog tag nrho SC interfaces.Lwm qhov kev sib txuas muaj xws li FC thiab ST.